guides 2025-05-10 · 6 min read

Nejlepší formáty obrázků pro web v roce 2025

JPEG, PNG, WebP, AVIF, HEIC — který formát použít? Datově řízené srovnání s benchmarky velikosti, kvality a kompatibility.

Best Image Formats for Every Use Case in 2025

Choosing the right image format in 2025 isn’t about picking one winner — it’s about matching the format to your specific needs.

Quick Decision Tree

Need transparency?
  Yes → Need animation?
    Yes → WebP or APNG
    No  → WebP lossless or PNG (fallback)
  No → Photo or graphic?
    Photo → Need max compression?
      Yes → AVIF (slow encode)
      No  → WebP (fast encode, great compression)
    Graphic → WebP lossless or PNG

Format Deep Dive

JPEG (1992)

  • Best for: Legacy compatibility
  • Avoid: When you need transparency or small file sizes
  • Quality: Lossy only

PNG (1996)

  • Best for: Graphics with text, screenshots
  • Avoid: Photographs (10x larger than WebP)
  • Quality: Lossless

WebP (2010)

  • Best for: Default choice for web
  • Avoid: When you need IE11 support
  • Quality: Both lossy and lossless

AVIF (2019)

  • Best for: Maximum compression
  • Avoid: When encode speed matters
  • Quality: Both lossy and lossless

HEIC/HEIF (2015)

  • Best for: iPhone storage
  • Avoid: Web delivery (limited browser support)
  • Quality: Excellent, but convert to WebP for web

iPhone HEIC to WebP Workflow

  1. Export HEIC from iPhone
  2. Convert with our HEIC to WebP tool
  3. Use <picture> element for fallback
  4. Profit from 50% smaller files

Convert any format to any other with AmberPic.

#formáty #webp #avif #porovnání

Zpracujte obrázky zdarma, bez nahrávání

Vyzkoušejte naše nástroje pro kompresi, konverzi a změnu velikosti.

Zobrazit nástroje